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PLANT EQUIPMENT AND MINING PROPERTIES (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Statement [Line Items]    
Beginning Balance $ 69,141,000 $ 58,599,000
Additions/ Transfers 5,245,000 12,346,000
Writedowns Effect of movements in   (1,792,000)
Effect Of Movements In Exchange Rates 4,000 (12,000)
Ending Balance 74,390,000 69,141,000
Accumulated Depletion And Depreciation, Beginning Balance 25,085,000 22,924,000
Accumulated Depletion And Depreciation, Additions / Transfers 697,000 3,623,000
Accumulated Depletion And Depreciation, Effect Of Movements In Exchange Rates 0 (1,462,000)
Accumulated Depletion And Depreciation, Ending Balance 25,782,000 25,085,000
Net book value, Beginning balance 44,056,000 35,675,000
Net book value, Ending 48,608,000 44,056,000
Office Equipment Furniture And Fixtures [Member]    
Statement [Line Items]    
Beginning Balance 763,000 595,000
Additions/ Transfers 46,000 185,000
Effect Of Movements In Exchange Rates 0 (17,000)
Ending Balance 809,000 763,000
Accumulated Depletion And Depreciation, Beginning Balance 441,000 294,000
Accumulated Depletion And Depreciation, Additions / Transfers 29,000 147,000
Accumulated Depletion And Depreciation, Effect Of Movements In Exchange Rates 0 0
Accumulated Depletion And Depreciation, Ending Balance 470,000 441,000
Net book value, Beginning balance 322,000 301,000
Net book value, Ending 339,000 322,000
Mine Machinery And Transportation Equipment [Member]    
Statement [Line Items]    
Beginning Balance 14,930,000 14,240,000
Additions/ Transfers 1,998,000 2,383,000
Writedowns Effect of movements in   (1,692,000)
Effect Of Movements In Exchange Rates 0 (1,000)
Ending Balance 16,928,000 14,930,000
Accumulated Depletion And Depreciation, Beginning Balance 5,178,000 4,944,000
Accumulated Depletion And Depreciation, Additions / Transfers 24,000 1,616,000
Accumulated Depletion And Depreciation, Effect Of Movements In Exchange Rates 0 (1,382,000)
Accumulated Depletion And Depreciation, Ending Balance 5,202,000 5,178,000
Net book value, Beginning balance 9,752,000 9,296,000
Net book value, Ending 11,726,000 9,752,000
Mill Machinery And Processing Equipment [Member]    
Statement [Line Items]    
Beginning Balance 23,294,000 18,613,000
Additions/ Transfers 2,429,000 4,781,000
Writedowns Effect of movements in   (100,000)
Effect Of Movements In Exchange Rates 0 0
Ending Balance 25,723,000 23,294,000
Accumulated Depletion And Depreciation, Beginning Balance 6,733,000 6,667,000
Accumulated Depletion And Depreciation, Additions / Transfers 475,000 146,000
Accumulated Depletion And Depreciation, Effect Of Movements In Exchange Rates 0 (80,000)
Accumulated Depletion And Depreciation, Ending Balance 7,208,000 6,733,000
Net book value, Beginning balance 16,561,000 11,946,000
Net book value, Ending 18,515,000 16,561,000
Mining Property [Member]    
Statement [Line Items]    
Beginning Balance 14,687,000 13,038,000
Additions/ Transfers 698,000 1,649,000
Writedowns Effect of movements in 0 0
Effect Of Movements In Exchange Rates 0 0
Ending Balance 15,385,000 14,687,000
Accumulated Depletion And Depreciation, Beginning Balance 9,106,000 8,856,000
Accumulated Depletion And Depreciation, Additions / Transfers 85,000 250,000
Accumulated Depletion And Depreciation, Effect Of Movements In Exchange Rates 0 0
Accumulated Depletion And Depreciation, Ending Balance 9,191,000 9,106,000
Net book value, Beginning balance 5,581,000 4,182,000
Net book value, Ending 6,194,000 5,581,000
Computer equipment [member]    
Statement [Line Items]    
Beginning Balance 774,000 335,000
Additions/ Transfers 12,000 441,000
Effect Of Movements In Exchange Rates 0 (2,000)
Ending Balance 786,000 774,000
Accumulated Depletion And Depreciation, Beginning Balance 598,000 267,000
Accumulated Depletion And Depreciation, Additions / Transfers 14,000 331,000
Accumulated Depletion And Depreciation, Effect Of Movements In Exchange Rates 0 0
Accumulated Depletion And Depreciation, Ending Balance 612,000 598,000
Net book value, Beginning balance 176,000 68,000
Net book value, Ending 174,000 176,000
Buildings and construction in process [Member]    
Statement [Line Items]    
Beginning Balance 14,693,000 11,778,000
Additions/ Transfers 62,000 2,907,000
Writedowns Effect of movements in 0 0
Effect Of Movements In Exchange Rates 0 8,000
Ending Balance 14,759,000 14,693,000
Accumulated Depletion And Depreciation, Beginning Balance 3,029,000 1,896,000
Accumulated Depletion And Depreciation, Additions / Transfers 70,000 1,133,000
Accumulated Depletion And Depreciation, Effect Of Movements In Exchange Rates 0 0
Accumulated Depletion And Depreciation, Ending Balance 3,099,000 3,029,000
Net book value, Beginning balance 11,664,000 9,882,000
Net book value, Ending $ 11,660,000 $ 11,664,000